Core i7-8550U vs i5-7400
Description
Both models i7-8550U and i5-7400 are based on Kaby Lake architecture.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i7-8550U gets a score of 166.1 k points while the i5-7400 gets 173.7 k points.
Summarizing, the i5-7400 is 1 times faster than the i7-8550U. To get a proper comparison between both models, take a look to the data shown below.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i7-8550U gets a score of 166.1 k points while the i5-7400 gets 173.7 k points.
Summarizing, the i5-7400 is 1 times faster than the i7-8550U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
806ea
906e9
Core
Kaby Lake-R
Kaby Lake-S
Base frecuency
1.8 GHz
3 GHz
Boost frecuency
4 GHz
3.5 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
4/8
4/4
TDP
15 W
65 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
8192 kB
6144 kB
Date
August 2017
September 2016
Mean monothread perf.
64.2k points
52.69k points
Mean multithread perf.
166.12k points
173.7k points
AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i7-8550U
i5-7400
Test#1 (Integers)
13.15k
12.72k (x0.97)
Test#2 (FP)
19.7k
19.3k (x0.98)
Test#3 (Generic, ZIP)
5.1k
4.76k (x0.93)
Test#1 (Memory)
9.21k
8.73k (x0.95)
TOTAL
47.16k
45.52k (x0.97)
Multithread
i7-8550U
i5-7400
Test#1 (Integers)
34.13k
47.95k (x1.41)
Test#2 (FP)
53.79k
71.98k (x1.34)
Test#3 (Generic, ZIP)
13.91k
17.22k (x1.24)
Test#1 (Memory)
4.12k
8.03k (x1.95)
TOTAL
105.95k
145.18k (x1.37)
AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
i7-8550U
i5-7400
Test#1 (Integers)
25.37k
22.37k (x0.88)
Test#2 (FP)
22.6k
19.46k (x0.86)
Test#3 (Generic, ZIP)
5.13k
4.44k (x0.87)
Test#1 (Memory)
11.1k
6.41k (x0.58)
TOTAL
64.2k
52.69k (x0.82)
Multithread
i7-8550U
i5-7400
Test#1 (Integers)
72.82k
79.57k (x1.09)
Test#2 (FP)
71.71k
71.41k (x1)
Test#3 (Generic, ZIP)
17.35k
16.44k (x0.95)
Test#1 (Memory)
4.24k
6.27k (x1.48)
TOTAL
166.12k
173.7k (x1.05)
Performance/W
i7-8550U
i5-7400
Test#1 (Integers)
4855 points/W
1224 points/W
Test#2 (FP)
4781 points/W
1099 points/W
Test#3 (Generic, ZIP)
1157 points/W
253 points/W
Test#1 (Memory)
282 points/W
96 points/W
TOTAL
11075 points/W
2672 points/W
Performance/GHz
i7-8550U
i5-7400
Test#1 (Integers)
6343 points/GHz
6392 points/GHz
Test#2 (FP)
5650 points/GHz
5561 points/GHz
Test#3 (Generic, ZIP)
1282 points/GHz
1267 points/GHz
Test#1 (Memory)
2774 points/GHz
1832 points/GHz
TOTAL
16049 points/GHz
15053 points/GHz
Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.
Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.
Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.
Test#1 (Integers) [points vs time]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.
If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.
If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.
Test#1 (Integers) [points vs time]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4